Shock-absorber.



N.. 895,113. Bum-:TBD AUG. 4, 190s.

J. A. SCOTT. suomi ABsoRBBR.

lait/2 esses:

i i i i l i l JAMES ARTHUR SCOTT, .OF LOS ANGELES, CALIl-TRNlA.

pp No. 895,1 13.

` Application filed April 11, 1907. Serial No. 367,704.

To all whom it 'may concern:

Be it known th'at. I, JAMES Asriitn Scorr, a citizen of the United States, residing at Los Angelesz in the county of Los Angeles and Stiite of California, have invented a new and useful Shocku'lbsorber, of which the following is n specification.

This invention relates to shock ebsorbcrs,-

and the object of the. resent invention is to provide n shock absor ier in which a revoluile or rocking friction means is employed in conjunction with e. cylinder and piston cushion device arranged intermediate the frame of the vehicle and the axle for reducing or nullifyiiig the abru t relative movement bctween the axle an frame to reduce or absorb the shocks or jolts`i'rr'ipnrtcd i0 the veliicne in traveliiw over the road.

Referring to ille drnwings:-Figure 1 is a side elevation' of the shock absorber, a portion of the frame and adjacent soring of thc v'ehicle being shown, the axle of the vehicle being shown in cross section. view of the device, showing portions o the frame and axle. Fiff. 3 is a vertical cross section on line :c3-x7 ig. 1. Fig. i is an enlarged section on linc z--:c Fig. 1. Fig. 5 is a plan view of the friction plate. Fig. 6 is a plan view of the spider spring. Fig. 7 is a side elevation of the spider spring.

The device comprises an inner disk 1 which is fastened to the frame 2 of the vehicle by bolts 3. The dish 1 has e. conical friction fac-e 4, and rigidly mounted on the disk is it stud. -5 having a square shank 6, the outer port-ion of stud 5 being roiind and screwthreaded and carryiner a nut 7. A rock arni 8 is fo'rrned with n ub 9, .the hub being formed with n concave recess in each face thereof as 'clearly shown in Fig. 4, and having flanges 10 which forin outer walls oi the recesses. The hub 9 is revolubly mounted on the squared portion 6 of screw 5. having ii. round bore which permits rocking iiiovcnient of the hub 9 and its arm S. A friction plate 11 is formed with a conical frict'm foce.

'12, and as shown in Fig. 5 is provided with it square central orifice 13. 'lht` friction plate .11 tits on the stpiared shank t of he sind 5 and is thus heh against revolution. lnterposed between the stationary disk l and thc adjacent friction face of the hub i) is :i friction washer 14 preferably of leather. :i .similar washer being,r interposed between the plate 1l and the other face of liob- 9. -i spring 15 having oll'sct iirnis 16, :is shown in Figs. ti

Fig. 2 is a )hin Specbation of Letters Patent.

SHOCK-AB SOR-BER.

Patenten Aug. 4, 100e.

and 7, is mounted on the round portion of stud 5, Vand the nut 7 holds` thc spring 15 in place with its arms- 16 resilieiitly bearing against the platc'll and thus holding the two washers 14 with the requisitel degree of pres sure between the respective friction disks l 11nd 11. Thus, rockingf 'movement of the arm 8 is restrained b v the friction produced at the hub 9, and this friction may be regnhitcd by varying the tension of springr 1.3 which is accomplished b v adjusting the nut 7.

Att-iiched to the. free end of the rock iirin 8' is a cylinder 17, the upper end of which is forked forming arms 1S, between which the rock arni 8 is received and pivotcd thereto by a bolt 19, each arm 18 having concave reccsses which receive respectively the coned head 2O and a concd nut 21 on the other end of the bolt l0, the nut 21 being locked in the desired position by ii cotter pin `Z2 which iS. received in radial slots formed in the nut. The nut 21 may bc adjusted to produce any desired amount of friction between the concd faces of the nutund head of the holt. with their adjacent. iii-ms 18 and between the arms 18 and the end of the rock arm S, as the arms 18 niiiy bc sprung against the arm S by setting up the nut 2l. Thus, an additional friction device is afforded iit this joint and the friction may be regulated to the desired degree.

The lower end of ovhndcr 17 is screw-- threaded, and attached thereto is ii cap 23 having :i reduced portion 24 through which a,

shaft 25 passes to the cylinder 17. 'lheuir per end of shaft 25 is screwed to a plunger 26 which is cupped in both u per and lower faces its shown. Interpose( between each end of plunger 26 and the cylinder and cap .23 are coil s iiinvs 27 und '2S 'which servo to iioriiiiill;Y hold the )longer 26 in a 'central position in the cylinder i7. The lower end of shaft 2.5 is flattened and pivoted to ii forked lng,r 21) which is connected to the 'axle 30, the forlitd lug 2Q, having conical recesses .similaito the arms 18 and being.: connected to theV piston rod '25 by a, boltl 31 similar to the bolt 19 above described, having the conid head nud conical nut. Thus, any desired degree of friction may be secured :it the joint be tween the piston rod 25 and lng,t 2t), and wear at this point or at the end of arm S may rcadilv be taken np and rattling is absolutely. prevented at these joints.

ln operatio'n,as the vehicle moves over the. rond andthe relative movement occurs between the axle 30 :ind frame of tho vehicle,

ami tu mvrcutnv thv frit'tiun :it thv huh t) :intl rock the stung.

uml tlisks. snill tlisks living -mppnl'tvtl hy inv Utl 

